@article{UFA_2019_11_3_a7,
     author = {R. N. Garifullin and R. I. Yamilov},
     title = {On series of {Darboux} integrable discrete equations on square lattice},
     journal = {Ufa mathematical journal},
     pages = {99--108},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2019_11_3_a7/}
}